Characteristics
The flyback converter is an isolated version of the buck-boost converter. Depending on the winding ratio of the coupled power inductor, the input voltage can be higher, lower or equal to the output voltage.
The isolated output feedback can be acquired either directly from a winding of the transformer or by using an optocoupler.
The flyback is the simplest solution for an isolated switching power supply (SMPS) with low power output. For power ratings above 50 W usually more efficient topologies are used.
Reference Designs
- https://www.we-online.com/rd001 6 W Bipolar isolated auxiliary supply for SiC-MOSFET and IGBT gate driver
- https://www.we-online.com/rd002 6 W Unipolar isolated auxiliary supply for SiC-MOSFET and IGBT gate driver
Application Notes
- ANP010 Measurement DC-DC Switching Regulators
- ANP044 Impact of the layout, components, and filters on the EMC of modern DC/DC switching controllers
- ANP062 LC Filter Design With MLCCs: Why The Applied Voltage Matters
- ANP071 Aluminum Electrolyticvs.Aluminum Polymer Capacitor and how its benefits are used properly
- ANS004 Input Filter for MagI³C Power Modules
- SN008 Expected Lifetime of Aluminum Electrolytic and Aluminum Polymer Capacitor
Products of interest
Videos
Würth Elektronik Webinar: Magnetics design & selection – intermediate level
Videos
Webinar: Feedback loop compensation of current-mode Flyback converter
Videos
Throwback- Basics of Power Transformers
Videos
Feedback Loop Compensation of a Current-Mode Flyback Converter with Optocouplers
Videos
Würth Elektronik Webinar: Transformers - what characteristics are important to you?
Videos
Flexible Transformers for DC/DC Applications